Thanks noobman
It's not reverse polarity as the power wiring had worked ok before, as I'd been testing motors and end stops.
Would just driving the motors up and down and not pressing the "motor off" button in Pronterface, cause the stepper drivers to overheat?
They stepper drivers didn't have heat sinks or a fan as it didn't come as part of the kit I got from Blomker.com .
I still can't figure out why the arduino board literally went up in smoke and also still seems to attempt to draw so much current from USB that the 5v collapses to 1v
But I guess the fault in the arduino could be caused by an original short on the RAMPS.
It's not reverse polarity as the power wiring had worked ok before, as I'd been testing motors and end stops.
Would just driving the motors up and down and not pressing the "motor off" button in Pronterface, cause the stepper drivers to overheat?
They stepper drivers didn't have heat sinks or a fan as it didn't come as part of the kit I got from Blomker.com .
I still can't figure out why the arduino board literally went up in smoke and also still seems to attempt to draw so much current from USB that the 5v collapses to 1v
But I guess the fault in the arduino could be caused by an original short on the RAMPS.